thatIcoulduseaspecialpieceofcl

________that I could use a special piece of cloth to attract people's attention, I decided to do an experiment.

A．Having realized	B．Realizing
C．Being realized	D．Realized

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Bring the flowers into a warm room ___ they'll soon open.

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A．till

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（2012全国新课程）I don't believe we've met before, I must say you do look familiar.

A．therefore	B．although
C．since	D．unless

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